Large Object Theory
If you are carrying a large enough object in your hands, observers will simply think you are going where you are supposed to be going, and doing what you are supposed to be doing. Useful in mischievous endeavors.
Large Object Theory occurs if you walk by a staff meeting carrying three large crates, people will assume that those crates need to be somewhere, and you have been assigned to the task. They won't stop you to insist you attend the meeting.